Key facts
- Capacity
- About 1,900 m³/day; 82 l/s flow to treatment
- Treatment process
- Imhoff tanks, trickling filters and final sedimentation
- Sludge / energy
- Five sludge drying beds; 248 kW solar PV plant
- Population served
- Designed for about 20,000 population equivalent
- Scope
- Design–build + 2 years O&M (FIDIC Yellow Book)
Design, construction, commissioning and two years of operation and maintenance of the Salfeet Wastewater Treatment Plant in the West Bank, with a turnkey 248 kW solar PV plant, for the Municipality of Salfeet under the KfW-funded Salfeet Sewerage Project. The plant treats about 1,900 m³/day for about 20,000 population equivalent. MACC designed, built and operated the plant, supervised by GITEC-IGIP. The employer took over the plant in February 2022.
Scope of work
- Detailed design of the treatment plant and associated works
- Inlet works: penstock, coarse and fine screens with screenings wash presses, aerated grit and grease chambers with grit classifier, inlet flow flume with sampler, and a faecal-sludge acceptance point
- Two Imhoff tanks for primary sedimentation and sludge digestion
- Two trickling filters with internal recirculation and two final sedimentation tanks
- Five sludge drying beds and an odour-control unit
- Operational and administration buildings, ancillary piping, mechanical equipment and electrical wiring
- Turnkey 248 kW solar PV plant
- 24 months of operation and maintenance with training of the municipality's operating staff, including training abroad
Technology and key components
- Coarse screen with 10 mm openings and two fine screens with 3 mm openings
- Two aerated grit and grease chambers, 11 m long
- Two Imhoff tanks, 23.4 m × 7.1 m, 9.55 m inner height
- Two trickling filters, 12.5 m diameter and 4.85 m high, with 100–200% recirculation
- Two final sedimentation tanks, 15 m diameter
- Five sludge drying beds, 30 m × 12 m each
